Portable heater



FIG. 1 is a perspective elevational view of my new design;

FIG. 2 is a front view of the embodiment of FIG. 1;

FIG. 3 is a left side view of same;

FIG. 4 is a right side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top view of the new portable heater; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a portable heater, as shown and described. 